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2950 Rousseau (1974 VQ2)
Classification: Main-belt Asteroid          SPK-ID: 2002950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2596876618467253 1.7003e-08  
a 2.757215955766233 9.3007e-09 au
q 2.041200991006816 4.7574e-08 au
i 9.632892057656953 8.4908e-07 deg
node 111.6695993675053 5.9989e-06 deg
peri 295.769687603755 6.6176e-06 deg
M 20.7978032714786 2.93e-06 deg
tp 2459103.890559594407
(2020-Sep-11.39055959)
1.3382e-05 TDB
period 1672.263079519972
4.58
8.4613e-06
2.317e-08
d
yr
n .2152771321742862 1.0893e-09 deg/d
Q 3.473230920525651 1.1716e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2670  
   data-arc span      21598 days (59.13 yr)  
   first obs. used      1962-02-04  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42849  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:38:37  

Additional Information
 Earth MOID = 1.07224 au 
 Jupiter MOID = 1.99138 au 
 T_jup = 3.273 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.89   n/a MPCxxxxx  
diameter diameter 10.149 km 0.253 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.228 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.279   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2950 Rousseau (1974 VQ2)          Discovered 1974-Nov-09 by Wild, P. at Zimmerwald
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1974 VQ2 = 1939 CE = 1962 CG = 1978 NU5 = 1980 AG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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